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QxOrm
1.2.7
C++ Object Relational Mapping library
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00001 /**************************************************************************** 00002 ** 00003 ** http://www.qxorm.com/ 00004 ** Copyright (C) 2013 Lionel Marty (contact@qxorm.com) 00005 ** 00006 ** This file is part of the QxOrm library 00007 ** 00008 ** This software is provided 'as-is', without any express or implied 00009 ** warranty. In no event will the authors be held liable for any 00010 ** damages arising from the use of this software 00011 ** 00012 ** Commercial Usage 00013 ** Licensees holding valid commercial QxOrm licenses may use this file in 00014 ** accordance with the commercial license agreement provided with the 00015 ** Software or, alternatively, in accordance with the terms contained in 00016 ** a written agreement between you and Lionel Marty 00017 ** 00018 ** GNU General Public License Usage 00019 ** Alternatively, this file may be used under the terms of the GNU 00020 ** General Public License version 3.0 as published by the Free Software 00021 ** Foundation and appearing in the file 'license.gpl3.txt' included in the 00022 ** packaging of this file. Please review the following information to 00023 ** ensure the GNU General Public License version 3.0 requirements will be 00024 ** met : http://www.gnu.org/copyleft/gpl.html 00025 ** 00026 ** If you are unsure which license is appropriate for your use, or 00027 ** if you have questions regarding the use of this file, please contact : 00028 ** contact@qxorm.com 00029 ** 00030 ****************************************************************************/ 00031 00032 #ifndef _QX_CACHE_H_ 00033 #define _QX_CACHE_H_ 00034 00035 #ifdef _MSC_VER 00036 #pragma once 00037 #endif 00038 00046 #include <boost/any.hpp> 00047 #include <boost/tuple/tuple.hpp> 00048 #include <boost/tuple/tuple_comparison.hpp> 00049 #include <boost/tuple/tuple_io.hpp> 00050 00051 #include <QxCommon/QxBool.h> 00052 00053 #include <QxCollection/QxCollection.h> 00054 00055 #include <QxSingleton/QxSingleton.h> 00056 00057 namespace qx { 00058 namespace cache { 00059 namespace detail { 00060 00061 class QX_DLL_EXPORT QxCache : public qx::QxSingleton<QxCache> 00062 { 00063 00064 friend class qx::QxSingleton<QxCache>; 00065 00066 protected: 00067 00068 typedef boost::tuple<long, QDateTime, boost::any> type_qx_cache; 00069 typedef qx::QxCollection<QString, type_qx_cache> type_qx_lst_cache; 00070 00071 type_qx_lst_cache m_cache; 00072 QMutex m_oMutexCache; 00073 long m_lMaxCost; 00074 long m_lCurrCost; 00075 00076 public: 00077 00078 QxCache(); 00079 virtual ~QxCache(); 00080 00081 long getCurrCost() const; 00082 long getMaxCost() const; 00083 void setMaxCost(long l); 00084 00085 long count() const; 00086 long size() const; 00087 bool isEmpty() const; 00088 bool exist(const QString & sKey) const; 00089 bool contains(const QString & sKey) const; 00090 boost::any at(const QString & sKey); 00091 long insertionCost(const QString & sKey); 00092 QDateTime insertionDateTime(const QString & sKey); 00093 void clear(); 00094 00095 bool insert(const QString & sKey, const boost::any & anyObj, long lCost = 1, const QDateTime & dt = QDateTime()); 00096 bool remove(const QString & sKey); 00097 00098 private: 00099 00100 void updateCost(); 00101 00102 }; 00103 00104 } // namespace detail 00105 } // namespace cache 00106 } // namespace qx 00107 00108 QX_DLL_EXPORT_QX_SINGLETON_HPP(qx::cache::detail::QxCache) 00109 00110 namespace qx { 00111 namespace cache { 00112 00117 inline void max_cost(long l) 00118 { qx::cache::detail::QxCache::getSingleton()->setMaxCost(l); } 00119 00124 inline long max_cost() 00125 { return qx::cache::detail::QxCache::getSingleton()->getMaxCost(); } 00126 00131 inline long current_cost() 00132 { return qx::cache::detail::QxCache::getSingleton()->getCurrCost(); } 00133 00138 inline long count() 00139 { return qx::cache::detail::QxCache::getSingleton()->count(); } 00140 00145 inline bool is_empty() 00146 { return qx::cache::detail::QxCache::getSingleton()->isEmpty(); } 00147 00152 inline void clear() 00153 { qx::cache::detail::QxCache::getSingleton()->clear(); } 00154 00159 inline bool exist(const QString & sKey) 00160 { return qx::cache::detail::QxCache::getSingleton()->exist(sKey); } 00161 00166 inline bool remove(const QString & sKey) 00167 { return qx::cache::detail::QxCache::getSingleton()->remove(sKey); } 00168 00173 template <typename T> 00174 inline bool set(const QString & sKey, T & t, long lCost = 1, const QDateTime & dt = QDateTime()) 00175 { 00176 boost::any obj(t); 00177 return qx::cache::detail::QxCache::getSingleton()->insert(sKey, obj, lCost, dt); 00178 } 00179 00184 template <typename T> 00185 inline T get(const QString & sKey) 00186 { 00187 boost::any obj = qx::cache::detail::QxCache::getSingleton()->at(sKey); 00188 if (obj.empty()) { return T(); } 00189 try { return boost::any_cast<T>(obj); } 00190 catch (const boost::bad_any_cast & err) { Q_UNUSED(err); return T(); } 00191 } 00192 00197 template <typename T> 00198 inline qx_bool get(const QString & sKey, T & t, QDateTime & dt) 00199 { 00200 dt = QDateTime(); 00201 if (! qx::cache::exist(sKey)) { return qx_bool(false, 0, "[QxOrm] qx::cache : key doesn't exist in cache"); } 00202 boost::any obj = qx::cache::detail::QxCache::getSingleton()->at(sKey); 00203 dt = qx::cache::detail::QxCache::getSingleton()->insertionDateTime(sKey); 00204 try { t = boost::any_cast<T>(obj); return qx_bool(true); } 00205 catch (const boost::bad_any_cast & err) { Q_UNUSED(err); return qx_bool(false, 0, "[QxOrm] qx::cache : bad any cast exception"); } 00206 } 00207 00212 template <typename T> 00213 inline qx_bool get(const QString & sKey, T & t) 00214 { 00215 QDateTime dt; 00216 return qx::cache::get<T>(sKey, t, dt); 00217 } 00218 00219 } // namespace cache 00220 } // namespace qx 00221 00222 #endif // _QX_CACHE_H_